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1.
An incredible state of being whereas one is so "ill" that "ill"ness is literally burstin' from every orifice of your body. (also Ill'ionaire and ill-ionaire)
That joint was so ill that it musta been written by an illionaire
by rtk12 April 20, 2010
 
2.
As in ILLIONAIRE Records...San Diego's Hottest Record Label....
www.illrecs.com
Illionaire Records is hosting the MF EXPO!
by Christophiz August 31, 2003
 
3.
Someone who thinks that they are very cool, but is really just a fucking loser
Yo, you see that illionaire tryin' to mack those bitches? too bad he's got the game of a retarded monkey
by I'm rich Beotch April 21, 2003